Question

A prokaryotic bacterial cell does not possess a
A. Nuclear membrane
B. Histones
C. Double-stranded DNA
D. Both A and B

Answer 1

Hint: Bacterial cell is a type of prokaryotic cell. The shape and size of bacterial cells vary from minute spheres, spiral threads, and cylinders, to filamentous chains and flagellated rods. They are microscopic in nature and are found everywhere on earth.

Complete answer: Cell theory states that all living organisms are made up of cells. The cell is the basic, smallest, and functional unit of life. The existing cells are produced from pre-existing cells. Cells can be further classified as prokaryotes and eukaryotes. Prokaryotes are considered as the smaller cells compared to the eukaryotes. Prokaryotic cells are surrounded by a plasma membrane with a characteristic cell wall whose composition may differ depending on the organism. Eukaryotes have distinct nuclei bound by a nuclear membrane. They consist of membrane-bound organelles like the endoplasmic reticulum and mitochondria. A bacterial cell is a prokaryote that is devoid of well-defined nuclei and lacks membrane-bound organelles. The bacterial cell consists of a chromosome having circular double-stranded DNA molecules. Histone proteins are absent in prokaryotic cells and are found in eukaryotic cells which regulate the function of the packaging of chromatin materials into nucleosomes.
So, option D is the correct option.

Note: Bacterial cells can be further classified as aerobic bacteria and anaerobic bacteria. Various species of bacteria are symbiotic in nature. Bacteria are used as antibiotics to treat bacterial infection and disease. Lactobacillus is a bacterium present in milk and milk products. Some species of bacteria like Myxococcus xanthus feed on other organisms for their food by killing them. Such species of bacteria are called predatory bacteria. Streptococcus pneumonia causes pneumonia disease.